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PiJuice HAT - Raspberry Pi Portable Power Platform
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Price: $135.54
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Sparkfun Item #: PRT-14803 -

"As one of the smallest systems around there are so many amazing things you could do with the Raspberry Pi if it was self-powered and portable. That’s exactly where the PiJuice comes it! A fully uninterruptible power supply HAT that will always keep your Raspberry Pi powered. The revolutionary PiAnywhere technology contained in every PiJuice HAT - is the best way to take your Pi off the grid! The on board real time clock (RTC) will let your Pi know what time it is even with no power...

Power Cable - 10A IEC C13 - 2m
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Price: $12.42
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Sparkfun Item #: TOL-14935 -

"This is an 18 AWG, 2 m (6 ft, 7 in) power cord with a power rating of 125 kW, at 125V. Features: -C13 Receptacle -18 AWG - 6 ft, 7in (201cm) Documents: Datasheet"

Power Supply - 20W, 5V
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Price: $27.02
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Sparkfun Item #: TOL-14931 -

"This is a 20W small wattage, green adapter (Level VI, GST25A05-P1J) that comply with up to date energy efficiency regulations (EISA 2007/DoE Level VI). The no load power consumption and the working efficiency of this adapter exceed the performance of Level V series adapters. This power supply is ideal for use in various types of consumer electronic devices, telecommunication devices, office and commercial facilities, industrial equipment, and a variety of systems that must meet the latest...

Relay 2PDT - 24VAC
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Price: $10.43
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Sparkfun Item #: COM-14954 -

"These are handy two pole - double throw (2PDT) sealed relays. This means that when current is applied to the coil it throws a simple changeover switch. These can be used to switch high voltage/high current devices easily and safely. Documents: Datasheet "

SparkFun 3.3V Step-Up Breakout - NCP1402
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Price: $11.30
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Sparkfun Item #: PRT-10967 -

"The NCP1402 is a 3.3V DC-DC converter. The breakout board will accept voltage inputs between 1 and 3 Volts (such as 1 or 2 AA batteries) and output a constant, low ripple 3.3V output capable of sourcing up to 200 mA. This board is great for supplying power to 3.3V sensors or providing 3.3V from a a single AA battery. The breakout board includes the necessary peripheral components. The input, output and ground pins are broken out on a 0.1" grid to allow easy access on a breadboard. Documents:...

SparkFun 5V Step-Up Breakout - NCP1402
Price: $10.35
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Sparkfun Item #: PRT-10968 -

"The NCP1402 is a 5V DC-DC converter. This breakout board will accept voltage inputs between 1 and 4 Volts and output a constant, low ripple 5V output capable of sourcing up to 200 mA. This board is great for supplying power to 5V sensors on a 3.3V board, or providing 5V from a AA battery. The breakout board includes all of the necessary peripheral components. The input, output and ground pins are broken out on a 0.1" grid to allow easy access on a breadboard. Documents: Schematic Eagle...

SparkFun Adjustable LiPo Charger
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Price: $20.78
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Sparkfun Item #: PRT-14380 -

"The SparkFun Adjustable LiPo Charger is a single-cell lithium polymer (LiPo) and lithium ion battery charger. Because it’s adjustable, this charger will be able to safely charge most of our single-cell batteries with ease. With its onboard charge rate selector, you will be able to set the maximum amount of current to charge your battery from 15mA to 500mA. Once the board is configured for the battery, you can connect power from either a microUSB cable or the pins below the USB connector...

SparkFun Battery Babysitter - LiPo Battery Manager
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Price: $34.69
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Sparkfun Item #: PRT-13777 -

"The SparkFun Battery Babysitter is an all-in-one single-cell Lithium Polymer (LiPo) battery manager. It’s half battery charger, half battery monitor, and all you’ll ever need to keep your battery-powered project running safely and extensively. The Battery Babysitter features a pair of Texas Instruments LiPo-management ICs: a BQ24075 battery charger and a BQ27441-G1A fuel gauge. The charger supports adjustable charge rates of up to 1.5A, as well as USB-compliant 100mA and 500mA...

SparkFun LiPo Charger Basic - Micro-USB
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Price: $15.56
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Sparkfun Item #: PRT-10217 -

"If you need to charge LiPo batteries, this simple charger will do just that, and do it fast! The SparkFun LiPo Charger Basic is stripped down of all features and just does one thing well - charge 3.7V LiPo cells at a rate of 500mA. It is designed to charge single-cell Li-Ion or Li-Polymer batteries. Check the datasheet below to see if it will work with your battery. The board incorporates a charging circuit, status LED, connector for your battery (JST-type used in the batteries we carry), and...

SparkFun LiPo Charger Basic - Mini-USB
Price: $15.56
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Sparkfun Item #: PRT-10401 -

"If you need to charge LiPo batteries, this simple charger will do just that. It is designed to charge single-cell Li-Ion or Li-Polymer batteries. Check the datasheet below to see if it will work with your battery. The board incorporates a charging circuit, status LED, connector for your battery (JST-type used in the batteries we carry), and a mini-USB connector. However, we do not recommend this charger with a 110mAh battery. Note: This version uses a mini-USB cable. We also have this charger...

SparkFun LiPo Charger/Booster - 5V/1A
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Price: $27.74
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Sparkfun Item #: PRT-14411 -

"The SparkFun 5V/1A LiPo Charger/Booster is a no-nonsense circuit for generating one amp from a Lithium Polymer battery at 5V. This LiPo charger is a very economical choice that is equipped with a simple booster circuit utilizing the PAM2401 IC, and includes protection diodes so you can run multiple cells in series for an extra kick. While the booster circuit is in operation, this board can draw more current the lower the input voltage, making it perfect to deliver a strong charge in a small...

SparkFun LiPo Fuel Gauge
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Price: $19.04
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Sparkfun Item #: TOL-10617 -

"LiPo batteries are a great way to power your projects. They’re small, lightweight, and pack a pretty good punch for their size. Unfortunately, even the best batteries eventually run low on power and when they do it’s often unexpected (and at the worst time). Don’t be caught by surprise next time your board suddenly powers-down! The SparkFun LiPo Fuel Gauge connects your battery to your project and uses a sophisticated algorithm to detect relative state of charge and direct...

SparkFun Power Cell - LiPo Charger/Booster
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Price: $34.69
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Sparkfun Item #: PRT-11231 -

"The PowerCell board is a single cell LiPo boost converter (to 3.3V and 5V) and micro-USB charger in one. The board comes with a JST connector for a single cell LiPo battery, a micro-USB connector for the 5V charge input, and selectable 3.3V and 5V output pins (labeled ‘out’). There are also two charge pins broken out (labeled ‘charge’), so you can use another 5V power source to charge the batteries, if you don’t have a micro-USB cable. We’ve also broken out...

SparkFun USB LiPoly Charger - Single Cell
Price: $27.74
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Sparkfun Item #: PRT-12711 -

"If you need to charge LiPo batteries, this simple charger will do just that, and do it fast! The SparkFun USB LiPo Charger is a basic charging circuit that allows you to charge 3.7V LiPo cells at a rate of 500mA or 100mA. It is designed to charge single-cell Li-Ion or Li-Polymer batteries. The board incorporates a charging circuit, status LED, selectable solder jumper for 500mA or 100mA charging current, external LED footprint, USB input, two pre-installed JST connectors for SYS OUT and BATT...

SparkFun Wake on Shake
Price: $45.13
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Sparkfun Item #: SEN-11447 -

"Have you ever wanted your project to just “hibernate” until someone picks it up or moves it? It’s a great strategy for dramatically extending the battery life of a widget that doesn’t need to be active all the time. The SparkFun Wake-on-Shake board is designed to make it really simple to do just that! The Wake-on-Shake, based on a concept by Nitzan Gadish of Analog Devices, combines the ATTiny2313A with the ADXL362 low-power MEMS accelerometer to cut power to your...

Tenergy T4s Intelligent Universal Charger - 4-Bay
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Price: $54.69
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Sparkfun Item #: TOL-14457 -

"The 4-Bay T4s Intelligent Universal Charger from Tenergy is an automatic smart charger compatible with almost all types of rechargeable batteries, thereby eliminating the need to own multiple chargers. Capable of automatically identifying and charging Lithium Ion (Li-ion), LiFePO4, NiMH and NiCD rechargeable batteries, the T4s applies the appropriate charging mode, whether it be a constant charge current (CC), constant charge voltage (CV) or trickle charge. The T4s is able to independently...

Uh-oh Battery Level Indicator Kit
Price: $10.35
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Sparkfun Item #: KIT-11087 -

Uh-oh Battery Level Indicator Kit Description: Under-powering a digital device can sometimes have pretty nasty consequences. Brown-out conditions can cause memory to get written or overwritten in odd ways, can cause unexpected behavior in connected systems and just generally screw up your day. One way to avoid this is to keep an eye on your battery voltage and turn off the system before it gets too low (or plug it in). We've whipped up a little board to help you out with this...